US-China tech tensions escalate amid reported iPhone ban and Huawei smartphone launch

China has reportedly banned government employees from using iPhones and plans to expand restrictions, wiping out $200 billion from Apple's market value.
The reported iPhone ban coincides with Huawei's launch of new smartphones, including one with an advanced Chinese-made processor.
Huawei's new smartphone is under investigation by the US government over concerns it violates export restrictions on Chinese chipmakers.
Lawmakers and analysts say the developments highlight rising economic brinkmanship between the US and China in the technology sector.
Experts warn the escalating tensions create significant risks for Apple and other tech firms heavily invested in China.